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Erik Jeppesen

Non-native Fish Occurrence and Biomass in 1943 Western Palearctic Lakes and Reservoirs and their Abiotic and Biotic Correlates

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  • Carolina Trochine, Univ Nacl Comahue, Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad Nacional del Comahue, CONICET, INIBIOMA, Lab Limnol
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  • Sandra Brucet, ICREA, ICREA, Catalan Inst Res & Adv Studies
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  • Christine Argillier, Irstea UR RECOVER
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  • Ignasi Arranz, Univ Vic, Universitat de Vic, Cent Univ Catalonia, BETA Tecnio Ctr, Aquat Ecol Grp
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  • Meryem Beklioglu, Middle East Tech Univ, Middle East Technical University, Kemal Kurdas Training Stn, Lake Eymir
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  • Lluis Benejam, Univ Vic, Universitat de Vic, Cent Univ Catalonia, BETA Tecnio Ctr, Aquat Ecol Grp
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  • Teresa Ferreira, Univ Lisbon, Universidade de Lisboa, Inst Super Agron
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  • Trygve Hesthagen, Norwegian Inst Nat Reasearch
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  • Kerstin Holmgren, Swedish Univ Agr Sci, Swedish University of Agricultural Sciences, Inst Fresh Water Res, Dept Aquat Resources
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  • Erik Jeppesen
  • Fiona Kelly, Inland Fisheries Ireland
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  • Teet Krause, Estonian Univ Life Sci, Estonian University of Life Sciences, Ctr Limnol IEAS
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  • Martti Rask, Nat Resources Inst Finland, Natural Resources Institute Finland (Luke)
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  • Pietro Volta, CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio degli Ecosistemi (ISE-CNR), Inst Ecosyst Study
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  • Ian J. Winfield, Lancaster Environm Ctr, NERC Natural Environment Research Council, Lancaster University, NERC Centre for Ecology & Hydrology, Lake Ecosyst Grp, Ctr Ecol & Hydrol
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  • Thomas Mehner, Leibniz Inst Freshwater Ecol & Inland Fisheries, Leibniz Institut fur Gewasserokologie und Binnenfischerei (IGB), Dept Ecosyst Res

Invasion of non-native species is considered a major threat to global biodiversity. Here we present a comprehensive overview of the occurrence, richness and biomass contribution of non-native fish species in 1943 standing water bodies from 14 countries of the Western Palearctic, based on standardised fish catches by multi-mesh gillnetting. We expected strong geographical gradients to emerge in the occurrence of non-natives. We further hypothesised that the contribution by non-natives to the local fish community biomass was correlated with local richness and the trophic level of native and non-native species. Non-native fish species occurred in 304 of 1943 water bodies (16%). If the average number of occupied water bodies per country was weighted by number of water bodies per country, the grand mean occurrence of non-natives in Western Palearctic water bodies was 10%. Exotic (non-native to the Palearctic) and translocated (non-native only to parts of the Palearctic) species were found in 164 (8.4%) or 235 (12.1%) of the water bodies, respectively. The occurrence and local richness of non-native fish species increased with temperature, precipitation and lake area and were substantially higher in reservoirs than in natural lakes. High local biomass contributions of non-native species were strongly correlated with low richness of native species and high richness of non-native species, whereas the trophic level of the fish species had only a weak effect. Single non-native species rarely dominated community biomass, but high biomass contributions and thus strong community and ecosystem impacts can be expected if several non-native species accumulate in a water body.

Original languageEnglish
Pages (from-to)395-409
Number of pages15
Publication statusPublished - Apr 2018

    Research areas

  • invasion biology, lake fish communities, translocated species, exotic species, invasion meltdown, trophic similarity, FRESH-WATER FISHES, SPECIES-RICHNESS, BIOLOGICAL INVASIONS, EUROPEAN LAKES, UNIT EFFORT, COMMUNITIES, HOMOGENIZATION, ASSEMBLAGE, DIVERSITY, PATTERNS

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